Metal shearing machine and the like



A. E- CARTLIDGE METAL SHEARING MACHINE AND THE LIKE Filed Nov. 6, 1946 l/V ALFRED Y VENTOR E. CARTLIDGE A TTOR/Vf) Patented May 30, 1950 UNITED EiNT T56 FFi'c EE 2,509,479 :METAnsHEARING MAcHIfiE-ANDTHEHKE Alfred Iii-award G'artlidge Wokingham; England (015 lei-43) '-.-parts of such -metalin a quickand-fiicient manner. I

A -furtherobject -is to provide means whereby the machine can be readilyadiusted during mnning -to take workof various thicknesses.

With-these and other objects invi ew the invention consists inproviding a shearing, riveting; punching or -lilge machine comprising a pair oflongitudinal members pivoted .together at an ---intermediate position, one end ofsaid pair of members providing jaws fitted with co-operat- ,lingwoperating members, onemernber 1. at the other end having rotatably mounted therein a shaft-having a -camoreccentric on which is mounted asleeve member having a balll like extension projecting into a recess formed in a block slid-ablymounted-in an inclined guide or recess-in the other longitudinal member and lever means to move the sleeve member and its -co-operating bloek againstthe action of spring means whereby the co-operating members will w beheld in a spaced and non-operative position to enable work-to be inserted between the jaws. The said leveris preferably so mounted and arranged as to positively hold the jaws out of operative position in one position of the lever or to permit of operation wh n in its other position.

-This invention -also consists in providing +means for the adjustment of the block in its inclined guide or recess whereby the .spacingmf the --jaws -may be varied to" operate efiiciently on work of various thicknesses.

The invention further consists in sc -arranging the lever-means that the jaws can be posi- -tive1y heldout of operative position dnring the running of --the--machine and "the means for adjustrnent to i take work of -varius J thicknesses may also be operatedduring running.

The invention will now be described with reference to the acoompanying drawing in which:

Fig. 1 shows by waylofexainple an elevation of one form of shearing machine constructed according to this invention;

prises a' base member in the-flform of' a longitudinal arm I having intermediately of its ends upstanding spaced ears" 2 adapted to carry a fulj crum' 3 for a further aim member 4 of si'ib'stanmany similarlength--tothei loiiver aim 1. The

lower arm'br base I is formed witnmeanssuch asapertured lugs or the like 5 whereby itm'ay "be bolted to a benchor othersupport. The forward "projecting portions of thearms I and 4 "whichprovide jaws 6 and 'l'arefitted with ciitting or shearing members 8 and 9 respectively "having cutting edges arrangezd substantially at rightangles tdthe said arms. The lowermutting member fifwhich is secured in the1bwer ."jaw 6 is of substantially square shape in cross "section'and formed with annpstanding. xioseWfl having'a curved orconvex cutting edgel l"'on fits inward end asshown more particularlvin Fig. 4 The upper cutting member 9' which is "preferably adjiistably mounted in the upper jaw Tis formed'with a depending nose [2 of curved or angular shape. The arrangement is such that the co-operating cutting memberst and 9 .1 provide afpointbr curved contact arrangedcentrally of the I longitudinal cutting members. Tli'us providing for efiicient shearing operation upon the downward movement of the upper cutter 9 in relation to the lower fixedciitter 8 in the manner to be hereinafter described. The 'cutters8 and Bare so shaped as to permit of intricate shearing and as the upper' cutter 9 is "moved at' a high speed shearing canbe""per formed in a quick and efficient manner by a nibbling action. The rear end of the longitudinal orbasernember l is formed with upstand- -inglugs '13 whichare fitted Withantifri6tion bearings I4 fora shaft [5 arranged at right angles to the base member I. This shaft"l5 is fitted. with a pulley l6 and is adapted tobe rotated by suitable power means but if desiredthe shaft may be manually operated. This power shaft !5 is formed; orprovidedwith an ec'centric portion i! on which is mounted an antifriction bearing 18 carrying a "sleeve meniber lllhaving aball like extensionm. This ball like'eiiten- "sion' Zllis' adaptedto"co operate*with-a' block member 2 slidably mounted in' an inclined "recess or guide groove'fZZ' formed or pmvmmn the undersuiface of the' upper armmenlber 4.

Conveniently this block inerhber fi is"formed i with a partsphericial recess bf ie'ssthalr a Hemisphere inshape "so thatthe' ball inemberfio ban co-opefate therewith. The blbck zl asprerer- "ably freely slidableinthe guide 0 series 2in "the'arm-mmber is' heldin" ositi'o'n a removal bythe ball member? and by spring means cohhecting the" outer 'eii'ms l and" 4 of tnemacn ne. conveniennythenpper arm fornctied with an aperture ZB-for a' thre'adediod 24 having" at its 'end a hookwfi for cofinecti n with? theend of a "coiled tension" spring 2fi" -secured in" an aperture in "the base conveniently "by across bar 2'5 'rnouhted in the lower 'edge of the base. "This threaded rod zd 'is heldein adjustable Tposition by a wring nut 2 8 abuttingon the enpperarm: 4- sc that the tension cf theespring 26 'can 'be readily adjusted. In 'order towaise 1 the upper arm v 4 outof operative position so 3 that work can be inserted for interior shearing the sliding block 2| is adapted to be moved longitudinally in its inclined guide-way 22 by means of a lever member 29. The lower end of this lever 29 has a fulcrum on a pin 30 extending from the base and adjacent to the fulcrum the lever 29 is fitted with an apertured swivel lug SI for the connection at one end of a connecting rod 32 which is connected at its other end to the sleeve member l9 through the medium of a further apertured swivel lug 33. The connecting rod 32 is screw threaded at each end and fitted with lock nuts 34 for adjustment purposes. The block 2! is adjustably mounted in its guide by means of an adjusting screw 35 fitted in the end of the upper arm 4. The end of this adjusting screw 35 is adapted to contact normally with the end of the block 2! and thus limit its movement in an outward direction. Conveniently the adjusting means comprise a milled headed screw 35 screwed into the end of the arm and adapted to be held in a locked position by a lock nut 35. The sliding block 2| is held normally against the end of the adjusting screw 35 by spring means such as a coiled spring mounted within a guide, but preferably by a coiled tension spring 31 connected at one end to the sleeve member l9 and at its other end to a bracket member 38 carried by the lower arm or base I. The outer end of the spring 3'! is preferably connected adjustably to the bracket member 38 by means of a, threaded hook 39 and an adjustable wing nut 49 having locking means 4|.

In operation and when the shaft is rotated at a high speed the cam ll will rock the upper arm 4 and the upper jaw I will move toward and away from the lower jaw ES so that the cutting operation will be efiected when work is inserted between the jaws, and cutting members 8 and 9. The upper jaw l is so moved in relation to the lower jaw 8 as to provide a nibbling eifect to the cutter 9. When it is desired to adjust the jaws 5 and I to take work of different thicknesses the adjusting screw 35 is rotated to move the block 2| in its slide 22 and the position of the block 21 will regulate the distance between the jaws 6 and l and the normal spacing thereof so that shearing can be effectively performed without burr. When it is desired to shear for instance the interior of a metal plate or tube the lever 29 is pulled on its fulcrum towards the operator so that the block 2| will be shifted towards the main fulcrum 3 of the machine as shown in Figure 2 and thus the outer jaw I will be raised to permit of the work to be inserted between the cutting jaws. The arrangement is such that the lever 29 is moved past the dead centre so that the block is held in its adjusted position, thus the cutter 9 in the upper jaw T is prevented from engaging with the co-operating cutter 8 in the lower jaw I so that the work can be inserted. When the lever 29 is moved back the sliding block 21 will be moved back by the spring means 31 so that it engages the adjusting screw 35 as shown in Figure 1 and the shearing will take place. It will be seen that the adjustment of the jaws l and B to take I work of various thicknesses and the raising and described in connection with a shearing ma- 4 chine it will be understood that the shearing elements 8 and 9 may be replaced by other tools such as forming or beading tools or turning over and fianging tools or riveting or punching tools.

What I claim is:

1. A metal working machine comprising a pair of longitudinal members pivoted together at an intermediate position, one end of said pair of members providing jaws fitted with co-operating members, one member at the other end having rotatably mounted therein a shaft having a cam means on which is mounted a sleeve member having a ball like extension projecting into a recess formed in a block slidably mounted in an inclined guide in the other longitudinal member and lever means to move the sleeve member and its co-operating block against the action of spring means, whereby the co-operating members will be held in a spaced and nonoperative position to enable work to be inserted between the jaws.

2. A machine as claimed in claim 1 wherein the lever is so mounted and arranged as to positively hold the jaws out of operative position in one position of the lever or to permit of operation when in its other position.

3. In a machine as claimed in claim 1 the provision of means for the adjustment of the block in its inclined guide whereby the spacing of the jaws may be varied.

4. A machine as claimed in claim 1 wherein means are provided for the adjustment of the jaws to take work of various thicknesses, the said means being so arranged as to be operated during the running of the machine.

5. A machine as claimed in claim 1 wherein the block is formed with a part spherical recess of less than a hemisphere in shape for the reception of the ball like extension of the sleeve member.

6. A machine as claimed in claim 1 wherein the block is freely slidable in the guide or recess and held against removal by the ball like extension and by spring means connecting the upper and lower longitudinal members of the machine.

7. A machine as claimed in claim 1 wherein the sliding block is held normally against adjusting means by a coiled tension spring connected at one end to the sleeve member and at its other end to a bracket member carried by the sleeve supporting longitudinal member.

8. A machine as claimed in claim 1 wherein the spring means comprise a coiled tension spring connected at one end to the sleeve member and at its other end to a bracket member carried by the sleeve supporting longitudinal member.

ALFRED EDWARD CARTLIDGE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 296,641 Springer Apr. 8, 1884 864,025 Oehring Aug. 20, 1907 1,052,331 Fanning Feb. 4, 1913 1,211,543 Chatfield Jan. 9, 1917 1,553,514 Denmire Sept. 15, 1925 2,333,293 Cartlidge Nov. 2, 1943 FOREIGN PATENTS Number Country Date 293,801 Italy Mar. 3, 1932 

